FA is required to run 112 octane leaded fuel supplied by Watkins Glen International at the track, or Sunoco 260GT unleaded fuel. Sunoco 260GT unleaded is not available at Watkins Glen and must be provided by the competitor.

All fuel testing commencing May 16th, 2015 will be using the above specified fuel as the baseline for chemical and dielectric comparison. This allows teams to have the testing period on Friday May 15th to flush their tanks.